No supplement has been proven to fully remove arterial plaque the way prescription medications can. That said, several supplements have shown measurable effects on plaque progression, arterial wall thickness, and plaque stability in clinical trials. Understanding what each one actually does, and what it doesn’t, can help you set realistic expectations.
For context, the strongest evidence for plaque reversal comes from prescription cholesterol-lowering drugs. In the ASTEROID trial, high-intensity statin therapy produced a 6.8% median reduction in total plaque volume. Newer injectable cholesterol drugs have achieved similar results. Supplements operate on a smaller scale, but some have genuine cardiovascular effects worth knowing about.
Nattokinase: The Strongest Supplement Evidence
Nattokinase, an enzyme derived from fermented soybeans, has the most direct evidence for reducing arterial wall thickness. In a clinical study of over 1,000 participants, nattokinase at a dose of 10,800 FU per day reduced carotid artery wall thickness by about 22% after 12 months, with average measurements dropping from 1.33 mm to 1.04 mm. Roughly 78% of participants showed measurable improvement in wall thickness, and about two-thirds showed improvement in plaque size.
Dosage matters enormously here. A lower dose of 3,600 FU per day was essentially ineffective, producing only a 4% change. This is a common issue with supplement research: many people take doses far below what was actually tested. Nattokinase works partly through its ability to break down fibrin, a protein involved in blood clotting and plaque formation.
Aged Garlic Extract: Slowing Calcium Buildup
Aged garlic extract doesn’t reverse existing plaque, but it slows the rate at which calcium accumulates in your arteries. In a randomized, double-blind trial, participants taking 2,400 mg of aged garlic extract daily for one year saw their coronary artery calcium scores increase by 20%, compared to 28% in the placebo group. Both groups still had calcium buildup, but the garlic group accumulated it significantly more slowly. The probability of being in the lowest-progression group was nearly three times higher with aged garlic extract compared to placebo.
This is an important distinction. Coronary artery calcium scores almost always go up over time, especially in people at elevated cardiovascular risk. What aged garlic extract appears to do is pump the brakes on that process rather than reverse it.
Vitamin K2: Keeping Calcium Out of Arteries
Vitamin K2 plays a specific biological role in arterial health. Your body produces a protein that inhibits calcium from depositing in artery walls, but that protein needs vitamin K to become activated. Without enough vitamin K, this protective protein stays in an inactive form and can’t do its job. Higher blood levels of the inactive form serve as a marker of vitamin K deficiency and are associated with worse cardiovascular outcomes.
The current recommended dietary allowance for vitamin K is 1 microgram per kilogram of body weight per day, which is set primarily for blood clotting rather than arterial health. Many researchers believe the amount needed for optimal arterial protection may be higher, though no large trial has yet demonstrated that K2 supplementation directly shrinks existing plaque. The evidence is strongest for its role in preventing new calcification rather than removing what’s already there.
Citrus Bergamot: Shifting Cholesterol Composition
Bergamot polyphenols, extracted from a citrus fruit grown mainly in southern Italy, produced notable results in a study of people with moderate high cholesterol. After six months, carotid artery wall thickness decreased by 25%, from 1.2 mm to 0.9 mm. The supplement also shifted LDL cholesterol from small, dense particles (the type most likely to penetrate artery walls and form plaque) to larger, less harmful particles. Small dense LDL subtypes dropped by 38% to 67% depending on the particle size.
This shift in cholesterol composition matters because not all LDL is equally dangerous. Small, dense LDL particles are more easily oxidized and more likely to contribute to plaque buildup. Moving the balance toward larger particles reduces the raw material that feeds plaque growth.
Pomegranate Juice: Antioxidant Protection
Pomegranate juice has been studied in patients with existing carotid artery narrowing. Over one year of daily consumption, carotid artery wall thickness decreased by up to 30%, while the control group (no pomegranate juice) saw a 9% increase. The benefits plateaued after the first year. Continuing pomegranate juice for up to three years didn’t further reduce wall thickness, though it continued to lower oxidized lipids in the blood.
The mechanism appears to be primarily antioxidant. Pomegranate polyphenols reduce the oxidation of LDL cholesterol, which is a key step in how cholesterol actually damages artery walls and triggers plaque formation.
Omega-3 Fatty Acids: Stabilizing Existing Plaque
High-dose omega-3s (specifically EPA at 4 grams per day) don’t dramatically shrink plaque volume, but they change its composition in ways that make it less dangerous. Compared to placebo, high-dose EPA reduced the volume of soft, unstable plaque material and increased the thickness of the fibrous cap that holds plaque together. This is significant because most heart attacks happen when a plaque ruptures, not simply because a plaque exists. A stable plaque with a thick cap is far less likely to cause a sudden cardiac event than a fragile one.
Standard fish oil doses (1 to 2 grams) have not shown these same imaging-confirmed effects. The plaque-stabilizing benefits appear to require prescription-strength doses.
How Long Before Changes Show Up
Arterial plaque builds up over decades, and reversing it is slow. A systematic review of plaque regression studies found that measurable regression occurred after an average of 19.7 months of treatment, even with the most potent prescription medications. This suggests you should expect to commit to at least one to two years of consistent use before any supplement could produce detectable changes on imaging.
Most of the supplement trials that showed positive results used 6- to 12-month timeframes, which is enough to detect changes in arterial wall thickness but may not capture deeper plaque remodeling. Patience and consistency are non-negotiable if you’re pursuing this approach.
Important Safety Considerations
Several of these supplements interact with blood-thinning medications. Nattokinase has direct fibrinolytic (clot-dissolving) activity and can amplify the effects of anticoagulants. Vitamin K2 works in the opposite direction: it can reduce the effectiveness of warfarin by activating clotting proteins that warfarin is designed to suppress. A systematic review identified 78 herbs, foods, or dietary supplements that interact with warfarin, with some interactions leading to serious bleeding events including, in rare cases, intracranial bleeding.
If you’re on any blood-thinning medication, adding these supplements without medical guidance is genuinely risky. Even garlic extract and omega-3s at high doses can affect bleeding time. The American College of Cardiology’s 2025 scientific statement on inflammation and cardiovascular disease does not recommend dietary supplements as a substitute for proven therapies like statins or newer cholesterol-lowering drugs. The statement emphasizes that robust trial evidence is still needed before anti-inflammatory or supplement-based strategies can be broadly recommended for plaque management.
What This Means Practically
The supplements with the most direct evidence for affecting arterial wall thickness are nattokinase (at the higher 10,800 FU dose), citrus bergamot, and pomegranate. Aged garlic extract and vitamin K2 are better understood as protective against further progression. High-dose omega-3s primarily stabilize existing plaque rather than shrinking it. None of these replace the 6 to 7% plaque volume reductions seen with prescription therapies, but they may offer complementary benefits, particularly for people focused on slowing progression or improving plaque composition.
The most honest answer to “what supplements remove plaque from arteries” is that none of them reliably remove plaque in the way that word implies. What some can do, based on current evidence, is reduce arterial wall thickness, slow calcium accumulation, and make existing plaque less likely to cause a heart attack. Those are meaningful outcomes, but they’re different from the clean-sweep reversal many people hope for.